package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.EmployeeNameExistException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 进行md5加密，然后再进行比对
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //判断用户名是否已将存在
        Employee emp = employeeMapper.getByUsername(employeeDTO.getUsername());
        if(emp!=null){
            throw new EmployeeNameExistException("账号"+employeeDTO.getUsername()+"已存在");
        }

        //实现对象属性拷贝
        Employee employee=new Employee();
        //实现原理：反射技术   将属性名相同的属性进行一一拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置账号的状态，默认正常状态 1表示正常 0表示锁定
        //补充实体类的值
        employee.setStatus(StatusConstant.ENABLE);
        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        //设置密码，对默认密码进行加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employeeMapper.insert(employee);

    }

    /**
     * 根据分页插件实现条件查询分页
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page page=employeeMapper.pageQuery(employeePageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 禁用启用员工账号
     * @param status
     * @param id
     */
    @Override
    public void updateStatus(Integer status, Long id) {
        employeeMapper.updateStatus(status,id);
    }

    /**
     * 根据id获取员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getEmpById(Long id) {
        return employeeMapper.getEmpById(id);
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     */
    @Override
    public void updateEmp(EmployeeDTO employeeDTO) {
        //拷贝员工信息
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //补充属性
        /*employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setUpdateTime(LocalDateTime.now());*/
        employeeMapper.updateEmp(employee);
    }
}
